diff --git a/system_state.cc b/system_state.cc
new file mode 100644
index 0000000..d2bd6f1
--- /dev/null
+++ b/system_state.cc
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <base/file_util.h>
+
+#include "update_engine/system_state.h"
+
+namespace chromeos_update_engine {
+
+static const char kOOBECompletedMarker[] = "/home/chronos/.oobe_completed";
+
+RealSystemState::RealSystemState() : connection_manager_(this) {}
+
+bool RealSystemState::IsOOBEComplete() {
+  return file_util::PathExists(FilePath(kOOBECompletedMarker));
+}
+
+void RealSystemState::SetDevicePolicy(
+    const policy::DevicePolicy* device_policy) {
+  device_policy_ = device_policy;
+}
+
+const policy::DevicePolicy* RealSystemState::GetDevicePolicy() const {
+  return device_policy_;
+}
+
+ConnectionManager* RealSystemState::GetConnectionManager() {
+  return &connection_manager_;
+}
+
+}  // namespace chromeos_update_engine